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Finding the Fourth Proportional to 665,093.08, 911,180.90 and 640,185.42

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Solution

The fourth proportional to 665,093.08, 911,180.90 and 640,185.42 is: 877,057.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,093.08 : 911,180.90 = 640,185.42 : x
  2. Step 2: Convert to fraction form
    665,093.08/911,180.90 = 640,185.42/x
  3. Step 3: Cross multiply
    665,093.08x = 911,180.90 × 640,185.42
  4. Step 4: Simplify right side
    665,093.08x = 583,324,728,578.83
  5. Step 5: Solve for x
    x = 583,324,728,578.83/665,093.08
  6. Step 6: Final answer
    x = 877,057.29

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.